3 shape-changing objects, interacting with each other, seen flowing southward over downtown chicago

There were 3 objects seen moving south over Chicago. They were first noticed over the near-north side of the city, passing over downtown, until out of sight. All 3 objects were the same color. They did not appear to be emitting any light of their own, but possibly reflecting the light of the city. The color of the objects was a muted pinkish hue, about the same color as the haze on the horrizon glowing from the city lights. For this reason, I first thought the objects were clouds or smoke from New Year's Eve fireworks, but then I realized that the sky was perfectly clear, and 2 of the objects were changing shape in what appeared to be a controlled movement. There was one object that appeared to be flying signifcantly higher than the other 2. This object did not change shape. It appeared to have wings, and looked like it could have been an aircraft, but it's shape was unlike any civilian aircraft I have seen. The other 2 objects appeared to be lower than the first. They followed the same path as the object above them. These 2 objects were amorphous. They were somewhat tubular and long, and kept twisting and contorting themselves, moving towards each other and back away, at times meeting with each other to form new shapes. They were not moving very fast. They were in view for about 1.5 to 2 minutes.